Question

There are four blood groups: A, B, AB and O.

Explain how a father who is blood group A and a mother who is blood group B can have a child that has

blood group O. (2)

Answer 1

it is because when breaking blood groups of parents they are (IAIO ) for mother and (IAIO) for the father , meaning both blood groups foe the parents has component (O) and during crossing of genes blood group O for a child can be a possible blood group.